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快三彩票>叶蜡石在耐火材料、陶瓷工业、水泥等行业中的应用分别是什么?

叶蜡石在耐火材料、陶瓷工业、水泥等行业中的应用分别是什么?

关注次数:         发布时间:2019-07-03

  一般所说的叶蜡石是以叶蜡石为主的矿石,所以也称之为叶蜡石。工业上所用的叶蜡石大多以叶蜡石为主,叶蜡石的分子式是Al2O3·4SiO2·H2O;其结构细微,呈鱗片状、致密块状,有滑腻感,与滑石极为相似。实际工业上所用的叶蜡石,因含有杂质不同有各种各样的颜色,如灰白色、灰色、蜡黄色、淡绿色、肉红色等。我国叶蜡石资源丰富,主要分布于东南沿海的火山岩发育地区,其中福建省、浙江省有多处矿点。叶蜡石作为原材料被广泛的应用在耐火材料、陶瓷工业、玻璃纤维、白水泥等产品的生产中。

叶蜡石

  TAOCIGONGYEZHONGDEYINGYONG

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叶蜡石

  YELASHIZAIBAISHUINIGONGYEZHONGDEYINGYONG

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  蜡石(或高岭石)、瓷土和瓷石、石灰石是生产白水泥的主要原料,如苏州光华白水泥厂即从当地的石灰石、瓷石和叶蜡石配制成,另加0.3%萤石作为助熔剂,在熟料中加入5%石膏作为缓凝剂,使用重柴油烧制而成,最高白度可达86度。为了保证白水泥的白度,因此要求蜡石中 Fe2O3 < 1 %,K2O+Na2O的含量也不能过高,以<2%为宜。一般说来,由高岭石族矿物和石英组成的低铁叶蜡石是生产优质白水泥的好原料。

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  (LASHIZHUAN)

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快三彩票  YELASHIZAIBOLIXIANWEIGONGYEZHONGDEYINGYONG

  叶蜡石是制造玻璃纤维的原料之一,在我国和日本主要用来制造无碱玻璃球,少数用来制造中碱玻璃球。供作玻璃球的叶蜡石,对其化学成分,尤其是Fe2O3和 K2O、Na2O有严格的要求,无碱玻璃球一般要求 Fe2O3 < 0.3%,K2O+Na2O < 0.5% , Al2O3含量25~ 27%。若含铁量高会影响热透性,消耗能源,目前我国利用叶蜡石制造玻璃纤维的厂家很多,主要有上海耀华玻璃厂、杭州玻璃厂、北京251研究所等。其生产工艺是先制成玻璃球,然后拉丝成玻璃纤维,玻璃球的原料除叶蜡石外,多数为天然矿石,只有少数几种原料为化工产品。主要原料是指引入玻璃网络形成物和改良的原料,如砂岩、天然石英砂、叶蜡石、石英岩、白云石、长石、硼酸、硼砂、纯碱等,辅助原料是指加速剂、澄清剂、脱色剂等,如亚砒酸、硝酸铵、萤石等,主要促进玻璃的熔制过程或使玻璃的性质发生某些改变。在玻璃球的原料配方中,叶蜡石的用量约22~25%不等。


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